sp304ct Exar Corporation, sp304ct Datasheet - Page 11

• Manufacturer Part Number: sp304ct
• Description: Rs-232/rs-422 Line Drivers/receivers
• Manufacturer: Exar Corporation

nects the driver outputs to the corresponding
receiver inputs, and switches the output pin to a
high impedance from V
outputs are left active for signal verification.
SIGNAL PROCESSING EXCELLENCE
One-Channel Full Duplex RS-232 &
RS-422 LINE DRIVER
RS-422 RECEIVER
One-Channel Full Duplex RS-422
RS-232 LINE DRIVERS
RS-232 RECEIVERS
Corporation
ROA
ROB
ROB
TIB
TIB
TIA
2
1
1
1
2
1
Opposite Drivers
SELECT A = 1
SELECT B = 0
LB = 0
SP304 CONFIGURATIONS IN LOOPBACK MODE
(ACTIVE)
EE
to ground. Receiver
TOB
TOB
TOA
TOA
RIB
RIB
RIA
RIA
2
1
1
2
2
1
2
1
During loopback, the receiver inputs are tied to
ground via a 5k
ceiver inputs can accept the full 15V swings
with no interference to the loopback function.
ROB
ROA
RS-422 LINE DRIVERS
RS-422 RECEIVERS
RS-422 LINE DRIVERS
RS-422 RECEIVERS
TIB
TIA
Two-Channel Full Duplex RS-422
1
1
1
1
SELECT A = 1
SELECT B = 1
LB = 0
pulldown resistor. The re-
(ACTIVE)
TOB
TOB
TOA
TOA
RIB
RIB
RIA
RIA
1
2
1
2
2
1
2
1
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